Question

Please use the accompanying Excel data set or accompanying Text file data set when completing the following exercise. The following data are the joint temperatures of the O-rings (°F) for each test firing or actual launch of the space shuttle rocket motor (from Presidential Commission on the Space Shuttle Challenger Accident, Vol. 1, pp. 129-131): 83 46 61 40 83 67 45 66 70 69 80 58 68 60 67 72 73 70 57 63 70 78 52 67 53 67 75 61 70 81 76 79 75 76 58 31 Round your answers to 2 decimal places (e.g. 98.76). (a) Using the entire data, calculate the sample mean and sample standard deviation Sample mean Sample standard deviation M. (b) Remove the smallest observation (31°F) and calculate the sample mean and sample standard deviation of the remaining data. Sample mean = i Sample standard deviation - (c) With the smallest observation removed: the sample mean and the sample standard deviation Statistical Tables and Chart-

Answer 1

Xc Given that (83 46 , 61,40 83, 67, 45, 66, 7, 69, 30, 56, 68, Go, 69, 72, 73, 70,57 63 70785267 Sela 75, 61, 70, 81, 76, 79 75 76, 58,31) 36 Sample moun x 2367 Xah & xa 7 Ane ) X = 65.75 2 2 Sample werviance s? n- 3 160879 - (23673} 149:9643 35 36 Sumple Standard deviatie SE Js² = 149.9643 Sample mean X= h Ix 2. 2 1 S 12.25 of we remove the smallest obscurahim (31°F) than the total no. of Observation X; 2336 66.74 35 =) 17 66.747 Sample variance s' È (x; ~3)² I Ş 159918- 236) 39 Sample Stundusa deviatim se [117844 10. 86 2 S-18.86 ) ma Suvelles) obvyhion removed The sample monn 66.74 and the sample Standard derighn Scanne 6 CamScanner Pro 36) 117.844 with the cs